WO2012165000A1

WO2012165000A1 - Method for preventing adhesion of processed object using forced thin-film fluid processing device

Info

Publication number: WO2012165000A1
Application number: PCT/JP2012/056735
Authority: WO
Inventors: 荒木加永子; 前川昌輝; 本田大介; 榎村眞一
Original assignee: エム・テクニック株式会社
Priority date: 2011-05-28
Filing date: 2012-03-15
Publication date: 2012-12-06
Also published as: US20140110884A1; JP5936142B2; KR20140016346A; JPWO2012165000A1; CN103561856A; EP2716354A4; CN103561856B; KR101912138B1; EP2716354A1; EP2716354B1

Abstract

Provided is a method for preventing a processed object from adhering to a processing surface constituting a flow path for a fluid to be processed, in a fluid processing method for mixing a fluid to be processed in a thin-film fluid formed between at least two opposedly arranged processing surfaces capable of being brought together and moved apart, at least one rotating in a relative manner with respect to the other; and for obtaining a processed object. There are used at least two types of fluids to be processed among a raw material fluid including at least one type of raw material substance, and a fluid for processing the raw material substance; the fluids to be processed are mixed in a thin-film fluid formed between at least two opposedly arranged processing surfaces (1, 2) capable of being brought together and moved apart, at least one rotating in a relative manner with respect to the other; and a processed object is obtained. The raw material fluid is introduced from the middle of the processing surfaces (1, 2), whereby the raw material substance processed in the space between the processing surfaces (1, 2) is prevented from adhering to the processing surfaces (1, 2).

Description

Method for preventing adhesion of treated object using forced thin film type fluid treatment system

The present invention relates to a method for preventing adhesion of a processed material.

Fine particles are required in the industrial field as a whole, and it is necessary to make fine particles according to the intended use, from micrometer-size fine particles to nanometer-size fine particles. In particular, nano particles (nano-sized fine particles) that are fine particles having a particle size of less than 1 μm exhibit new properties different from those of particles, and therefore, development of a new production method for industrial production of nanoparticles. Is needed. Also for micrometer-sized fine particles, there are problems with reproducibility and energy costs in the conventional production methods, and therefore, a fine particle production method that can easily control the particle diameter from micrometer to nanometer. The demand is growing. At the same time, the demand for the production amount of fine particles is increasing, and a production method of fine particles with a high production amount is demanded in the same manner as particle size control.

In order to solve the problems and problems of the technology known as the conventional “micro chemical process technology”, the applicant of the present application is based on a completely new concept of micro chemical process technology, and more specifically, the applicant has applied for it. There has been provided a method for producing nanoparticles using the principle of the apparatus shown in Patent Document 1 and using stirring and instantaneous uniform mixing of a plurality of types of fluids under a microchannel (Patent Document 2). This device uses the principle of mechanical seal, forms a forced thin film fluid of the fluid to be processed between the relatively displaceable processing surfaces that can be approached and separated, and is processed between the rotating processing surfaces. The fluid is supplied, and the distance between the processing surfaces is made minute by the pressure balance between the supply pressure of the fluid and the pressure applied between the rotating processing surfaces. The method before the method in the above principle is a method of mechanically adjusting the distance between the processing surfaces, which cannot absorb the heat generated by the rotation and the deformation caused by the rotation, or the runout, etc. It is practically impossible to make the distance between the processing surfaces at least 10 μm or less. That is, it is possible to realize the production of nanoparticles by an instantaneous chemical / physicochemical reaction or the like in a microchannel using the principle of the apparatus of Patent Document 1 above. As a result of research, it has surprisingly made it possible to instantaneously stir, mix, react, and deposit in a microchannel of 0.1 to 10 μm, as well as below 1 mm.

The microparticle production method proposed in Patent Document 2 is a very effective microparticle production method in that microparticles can be produced at low cost and low energy, but depending on the processing conditions, a thin film fluid flow path is formed. In some cases, the fine particles obtained may adhere to the processing surface to be produced, and as a result, the fine particles could not be stably produced / manufactured. This problem may be solved by preventing the adhesion of fine particles to the processing surface, but no method for preventing the adhesion has been disclosed so far. For this reason, a method for preventing adhesion has been appealed in the implementation of this manufacturing method.

JP 2004-49957 A International Publication WO2009 / 008393 Pamphlet

In view of the above, it is an object of the present invention to provide a method for preventing an object from adhering to a processing surface constituting a fluid flow path.

In the present invention, at least two kinds of fluids are used as the fluid to be treated, and at least one of the fluids is a raw material fluid containing at least one kind of raw material, and at least one other fluid other than the above. The kind of fluid is a fluid for treating the raw material, and the two or more kinds of fluids to be treated are disposed so as to face each other. In a fluid processing method for obtaining a processed raw material by mixing in a thin film fluid formed between at least two processing surfaces that rotate relatively, the raw material fluid is disposed so as to face each other. Possible introduction of raw material material between the processing surfaces by introducing from the center of at least two processing surfaces where at least one rotates relative to the other. Characterized in that to prevent Rukoto provides adhesion preventing method of the workpiece.
In the present invention, “preventing that the raw material treated between the processing surfaces adheres to the processing surface” is sufficient if it is substantially prevented from adhering, and need not be completely prevented. Absent. For example, when a fluid containing silver ions (raw material fluid) and a fluid containing a reducing agent (fluid for treating the raw material) are mixed between the processing surfaces to deposit silver fine particles, the precipitated silver fine particles Is attached to the processing surface, and the particle diameter of the silver fine particles discharged from between the processing surfaces changes with the processing time, or the silver fine particles adhering to the processing surface become coarse and coarse with the processing time. It is important to prevent a state in which the fine silver particles are discharged from between the processing surfaces.
Moreover, this invention can be implemented as said treatment being at least any one selected from precipitation, emulsification, dispersion, reaction, and aggregation.

The present invention includes an additional introduction path that is independent of a flow path through which the raw material fluid passes between the processing surfaces while forming the thin film fluid and through which the raw material fluid flows. At least one of the processing surfaces includes at least one opening that leads to the separate introduction path, the at least one other type of fluid is introduced between the processing surface through the opening, and The raw material fluid and the at least one other fluid can be mixed in the thin film fluid.
The present invention can be carried out as the raw material processed between the processing surfaces is a fine particle having a primary particle size equal to or smaller than the distance between the processing surfaces.
Further, in the present invention, at least one of the processing surfaces has an annular shape, and the raw material fluid is introduced between the processing surfaces from the center of the annular shape. The total opening area (a) of the gap between the processing surfaces at the point closest to the center of the ring where the one kind of fluid joins is the total opening area (b of the opening leading to the separate introduction path (b) ) And 5 times or less.
Further, at least one of the processing surfaces has an annular shape, and the raw material fluid is introduced between the processing surfaces from the center of the annular shape, and the separate introduction path leading to the processing surface is provided. The total opening area of the gap between the processing surfaces (a) at a point closest to the center of the ring where at least two openings are provided and the raw material fluid and the at least one other kind of fluid meet. ) Is less than 5 times the opening area of each opening that leads to the separate introduction path.
Moreover, it can implement as the shape of the opening part of the said separate introduction path leading to the said process surface being a ring shape.
At least one of the processing surfaces has an annular shape, and the raw material fluid is introduced between the processing surfaces from the annular center, and is introduced between the processing surfaces from the annular center. The flow rate of the raw material fluid per unit time may be 0.1 to 20000 times the flow rate of the at least one other type of fluid per unit time from the opening.

The present invention provides a fluid pressure applying mechanism for applying pressure to a fluid to be processed, a first processing portion having a first processing surface among the two processing surfaces, and the two processing surfaces. A second processing unit having a second processing surface, a rotation driving mechanism for relatively rotating these processing units, and the first processing unit and the second processing unit. Among these, at least the second processing portion has a pressure receiving surface, and at least a part of the pressure receiving surface is constituted by the second processing surface, and the pressure receiving surface is covered by the fluid pressure applying mechanism. It is appropriate to use a device that receives a pressure applied to the treatment fluid and generates a force that moves the second treatment surface away from the first treatment surface.

In addition, it is appropriate that the present invention is implemented on the assumption that the flow rate of the raw material fluid per unit time introduced between the processing surfaces from the annular center is 20 ml or more per minute.

The inventor introduces a fluid to be processed between at least two processing surfaces disposed opposite to each other and capable of approaching / separating at least one rotating relative to the other. In the fluid processing method for obtaining the raw material processed in the thin film fluid formed between the processing surfaces, among the fluids to be processed introduced between the processing surfaces, the raw material fluid is used for the above processing from the center of the annular processing surface. Introducing between the surfaces, it has been found that adhesion of the raw material processed between the processing surfaces to the processing surface can be prevented, thereby a new fluid for stably processing the fluid between the processing surfaces We were able to provide a method. In particular, for the purpose of producing fine particles, when the fine particles are produced for a long time between the processing surfaces, it was found that uniform fine particles can be produced continuously and stably, and the present invention was completed. I let you.

1 is a schematic cross-sectional view of a fluid processing apparatus according to an embodiment of the present invention. (A) is a schematic plan view of a first processing surface of the fluid processing apparatus shown in FIG. 1, and (B) is an enlarged view of a main part of the processing surface of the apparatus. (A) is sectional drawing of the 2nd introducing | transducing part of the apparatus, (B) is the principal part enlarged view of the processing surface for demonstrating the 2nd introducing | transducing part. It is a principal part enlarged view which shows the modification of the processing surface of the apparatus.

Hereinafter, the present invention will be described in detail by taking an example of an embodiment. However, the technical scope of the present invention is not limited by the following embodiments and examples.

The fluid processing apparatus shown in FIGS. 1 to 3 is the same as the apparatus described in Patent Document 2, and between the processing surfaces in the processing unit in which at least one of which can be approached and separated rotates relative to the other. A first fluid that is a first fluid to be treated among the fluids to be treated is introduced between the processing surfaces, and a flow path into which the first fluid is introduced. The second fluid, which is the second fluid to be treated among the fluids to be treated, is introduced between the processing surfaces from another flow path having an opening communicating between the processing surfaces. It is an apparatus that performs processing by mixing and stirring the first fluid and the second fluid between the surfaces. In FIG. 1, U indicates the upper side and S indicates the lower side. However, in the present invention, the upper, lower, front, rear, left and right only indicate a relative positional relationship, and do not specify an absolute position. 2A and 3B, R indicates the direction of rotation. In FIG. 3B, C indicates the centrifugal force direction (radial direction).

This apparatus uses at least two kinds of fluids as a fluid to be treated, and at least one kind of fluid includes at least one kind of an object to be treated and is opposed to each other so as to be able to approach and separate. Provided with a processing surface at least one of which rotates with respect to the other, and the above-mentioned fluids are merged between these processing surfaces to form a thin film fluid. An apparatus for processing an object to be processed. As described above, this apparatus can process a plurality of fluids to be processed, but can also process a single fluid to be processed.

This fluid processing apparatus includes first and

second processing units

10 and 20 that face each other, and at least one of the processing units rotates. The opposing surfaces of both processing

parts

10 and 20 are processing surfaces. The first processing unit 10 includes a first processing surface 1, and the second processing unit 20 includes a second processing surface 2.

Both the processing surfaces 1 and 2 are connected to the flow path of the fluid to be processed and constitute a part of the flow path of the fluid to be processed. The interval between the processing surfaces 1 and 2 can be changed as appropriate, but is usually adjusted to a minute interval of 1 μm to 1 mm, particularly 1 μm to 50 μm. As a result, the fluid to be processed that passes between the processing surfaces 1 and 2 becomes a forced thin film fluid forced by the processing surfaces 1 and 2.

When processing a plurality of fluids to be processed using this apparatus, the apparatus is connected to the flow path of the first fluid to be processed and forms a part of the flow path of the first fluid to be processed. At the same time, a part of the flow path of the second fluid to be treated is formed separately from the first fluid to be treated. And this apparatus performs processing of fluid, such as making both flow paths merge and mixing both the to-be-processed fluids between the processing surfaces 1 and 2, and making it react. Here, “treatment” is not limited to a form in which the object to be treated reacts, but also includes a form in which only mixing and dispersion are performed without any reaction.

Specifically, the first holder 11 that holds the first processing portion 10, the second holder 21 that holds the second processing portion 20, a contact pressure applying mechanism, a rotation drive mechanism, A first introduction part d1, a second introduction part d2, and a fluid pressure imparting mechanism p are provided.

As shown in FIG. 2A, in this embodiment, the first processing portion 10 is an annular body, more specifically, a ring-shaped disk. The second processing unit 20 is also a ring-shaped disk. The materials of the first and

second processing parts

10 and 20 are metal, carbon, ceramic, sintered metal, wear-resistant steel, sapphire, and other metals that have undergone hardening treatment, Those with coating, plating, etc. can be used. In this embodiment, at least a part of the first and second processing surfaces 1 and 2 facing each other is mirror-polished in the

processing units

10 and 20.
The surface roughness of this mirror polishing is not particularly limited, but is preferably Ra 0.01 to 1.0 μm, more preferably Ra 0.03 to 0.3 μm.

At least one of the holders can be rotated relative to the other holder by a rotational drive mechanism (not shown) such as an electric motor. Reference numeral 50 in FIG. 1 denotes a rotation shaft of the rotation drive mechanism. In this example, the first holder 11 attached to the rotation shaft 50 rotates and is used for the first processing supported by the first holder 11. The unit 10 rotates with respect to the second processing unit 20. Of course, the second processing unit 20 may be rotated, or both may be rotated. In this example, the first and

second holders

11 and 21 are fixed, and the first and

second processing parts

10 and 20 are rotated with respect to the first and

second holders

11 and 21. May be.

At least one of the first processing unit 10 and the second processing unit 20 can be approached / separated from at least either one, and both

processing surfaces

1 and 2 can be approached / separated. .

In this embodiment, the second processing unit 20 approaches and separates from the first processing unit 10, and the second processing unit 20 is disposed in the storage unit 41 provided in the second holder 21. It is housed in a hauntable manner. However, conversely, the first processing unit 10 may approach or separate from the second processing unit 20, and both the

processing units

10 and 20 may approach or separate from each other. It may be a thing.

The accommodating portion 41 is a concave portion that mainly accommodates a portion of the second processing portion 20 on the side opposite to the processing surface 2 side, and is a groove that has a circular shape, that is, is formed in an annular shape in plan view. . The accommodating portion 41 accommodates the second processing portion 20 with a sufficient clearance that allows the second processing portion 20 to rotate. The second processing unit 20 may be arranged so that only the parallel movement in the axial direction is possible, but by increasing the clearance, the second processing unit 20 The center line of the processing part 20 may be inclined and displaced so as to break the relationship parallel to the axial direction of the storage part 41. Further, the center line of the second processing part 20 and the storage part 41 may be displaced. The center line may be displaced so as to deviate in the radial direction.
As described above, it is desirable to hold the second processing unit 20 by the floating mechanism that holds the three-dimensionally displaceably.

The above-described fluid to be treated is subjected to both treatment surfaces from the first introduction part d1 and the second introduction part d2 in a state where pressure is applied by a fluid pressure application mechanism p configured by various pumps, potential energy, and the like. It is introduced between 1 and 2. In this embodiment, the first introduction part d1 is a passage provided in the center of the annular second holder 21, and one end of the first introduction part d1 is formed on both processing surfaces from the inside of the

annular processing parts

10 and 20. It is introduced between 1 and 2. The second introduction part d2 supplies the second processing fluid to be reacted with the first processing fluid to the processing surfaces 1 and 2. In this embodiment, the second introduction part d <b> 2 is a passage provided inside the second processing part 20, and one end thereof opens at the second processing surface 2. The first fluid to be processed that has been pressurized by the fluid pressure imparting mechanism p is introduced from the first introduction part d1 into the space inside the

processing parts

10 and 20, and the first processing surface 1 and the second processing surface 2 are supplied. It passes between the processing surfaces 2 and tries to pass outside the

processing portions

10 and 20. Between these

processing surfaces

1 and 2, the second fluid to be treated pressurized by the fluid pressure applying mechanism p is supplied from the second introduction part d 2, merged with the first fluid to be treated, and mixed. Various fluid treatments such as stirring, emulsification, dispersion, reaction, crystallization, crystallization, and precipitation are performed and discharged from both

treatment surfaces

1 and 2 to the outside of both

treatment portions

10 and 20. In addition, the environment outside both processing

parts

10 and 20 can also be made into a negative pressure with a decompression pump.

The above-mentioned contact surface pressure applying mechanism applies a force that acts in a direction in which the first processing surface 1 and the second processing surface 2 approach each other to the processing portion. In this embodiment, the contact pressure applying mechanism is provided in the second holder 21 and biases the second processing portion 20 toward the first processing portion 10.

The contact surface pressure applying mechanism is a force that pushes the first processing surface 1 of the first processing portion 10 and the second processing surface 2 of the second processing portion 20 in the approaching direction (hereinafter referred to as a contact surface). This is a mechanism for generating pressure. A thin film fluid having a minute film thickness in the unit of nm to μm is generated by the balance between the contact surface pressure and the force separating the processing surfaces 1 and 2 such as fluid pressure. In other words, the distance between the processing surfaces 1 and 2 is kept at a predetermined minute distance by the balance of the forces.

In the embodiment shown in FIG. 1, the contact surface pressure applying mechanism is arranged between the accommodating portion 41 and the second processing portion 20. Specifically, a spring 43 that biases the second processing portion 20 in a direction approaching the first processing portion 10 and a biasing fluid introduction portion 44 that introduces a biasing fluid such as air or oil. The contact surface pressure is applied by the spring 43 and the fluid pressure of the biasing fluid. Any one of the spring 43 and the fluid pressure of the urging fluid may be applied, and other force such as magnetic force or gravity may be used. The second processing unit 20 causes the first treatment by the separation force generated by the pressure or viscosity of the fluid to be treated which is pressurized by the fluid pressure imparting mechanism p against the bias of the contact surface pressure imparting mechanism. Move away from the working part 10 and leave a minute gap between the processing surfaces. As described above, the first processing surface 1 and the second processing surface 2 are set with an accuracy of μm by the balance between the contact surface pressure and the separation force, and a minute amount between the processing surfaces 1 and 2 is set. An interval is set. As the separation force, the fluid pressure and viscosity of the fluid to be processed, the centrifugal force due to the rotation of the processing portion, the negative pressure when the urging fluid introduction portion 44 is negatively applied, and the spring 43 are pulled. The force of the spring when it is used as a spring can be mentioned. This contact surface pressure imparting mechanism may be provided not in the second processing unit 20 but in the first processing unit 10 or in both.

The above-described separation force will be described in detail. The second processing unit 20 has the second processing surface 2 and the inside of the second processing surface 2 (that is, the first processing surface 1 and the second processing surface 2). A separation adjusting surface 23 is provided adjacent to the second processing surface 2 and located on the entrance side of the fluid to be processed between the processing surface 2 and the processing surface 2. In this example, the separation adjusting surface 23 is implemented as an inclined surface, but may be a horizontal surface. The pressure of the fluid to be processed acts on the separation adjusting surface 23 to generate a force in a direction in which the second processing unit 20 is separated from the first processing unit 10. Accordingly, the pressure receiving surfaces for generating the separation force are the second processing surface 2 and the separation adjusting surface 23.

Further, in the example of FIG. 1, the proximity adjustment surface 24 is formed on the second processing portion 20. The proximity adjustment surface 24 is a surface opposite to the separation adjustment surface 23 in the axial direction (upper surface in FIG. 1), and the pressure of the fluid to be processed acts on the second processing portion 20. A force is generated in a direction that causes the first processing unit 10 to approach the first processing unit 10.

Note that the pressure of the fluid to be processed that acts on the second processing surface 2 and the separation adjusting surface 23, that is, the fluid pressure, is understood as a force constituting an opening force in the mechanical seal. The projected area A1 of the proximity adjustment surface 24 projected on a virtual plane orthogonal to the approaching / separating direction of the processing surfaces 1 and 2, that is, the protruding and protruding direction (axial direction in FIG. 1) of the second processing unit 20 The area ratio A1 / A2 of the total area A2 of the projected areas of the second processing surface 2 and the separation adjusting surface 23 of the second processing unit 20 projected onto the virtual plane is called a balance ratio K. This is important for the adjustment of the opening force. The opening force can be adjusted by the pressure of the fluid to be processed, that is, the fluid pressure, by changing the balance line, that is, the area A1 of the adjustment surface 24 for proximity.

The actual pressure P of the sliding surface, that is, the contact pressure due to the fluid pressure is calculated by the following equation.
P = P1 × (K−k) + Ps

Here, P1 represents the pressure of the fluid to be treated, that is, the fluid pressure, K represents the balance ratio, k represents the opening force coefficient, and Ps represents the spring and back pressure.

By adjusting the actual surface pressure P of the sliding surface by adjusting the balance line, a fluid film is formed by the fluid to be processed so that a desired minute gap is formed between the processing surfaces 1 and 2, and the product is processed. The processed object is made fine and a uniform reaction process is performed.
Although not shown, the proximity adjustment surface 24 may be implemented with a larger area than the separation adjustment surface 23.

The fluid to be processed becomes a thin film fluid forced by the two

processing surfaces

1 and 2 holding the minute gaps, and tends to move to the outside of the

annular processing surfaces

1 and 2. However, since the first processing unit 10 is rotating, the mixed fluid to be processed does not move linearly from the inside to the outside of the two

processing surfaces

1 and 2, but instead has an annular radius. A combined vector of the movement vector in the direction and the movement vector in the circumferential direction acts on the fluid to be processed and moves in a substantially spiral shape from the inside to the outside.

In addition, the rotating shaft 50 is not limited to what was arrange | positioned vertically, The thing coordinated to the horizontal direction may be sufficient, and it may be coordinated inclined. This is because the fluid to be processed is processed at a fine interval between the processing surfaces 1 and 2 and the influence of gravity can be substantially eliminated. Further, this contact surface pressure applying mechanism also functions as a buffer mechanism for fine vibration and rotational alignment when used in combination with a floating mechanism that holds the second processing portion 20 in a displaceable manner.

At least one of the first and

second processing parts

10 and 20 may be cooled or heated to adjust the temperature. In FIG. 1, the first and

second processing parts

10 and 20 are adjusted. , 20 are provided with temperature control mechanisms (temperature control mechanisms) J1, J2. Further, the temperature of the introduced fluid to be treated may be adjusted by cooling or heating. These temperatures can also be used for the deposition of the treated material, and also to generate Benard convection or Marangoni convection in the fluid to be treated between the first and second processing surfaces 1 and 2. May be set.

As shown in FIG. 2, a groove-like recess 13 extending from the center side of the first processing portion 10 to the outside, that is, in the radial direction is formed on the first processing surface 1 of the first processing portion 10. May be implemented. As shown in FIG. 2B, the planar shape of the recess 13 is curved or spirally extending on the first processing surface 1, or is not shown, but extends straight outward, L It may be bent or curved into a letter shape or the like, continuous, intermittent, or branched. Further, the recess 13 can be implemented as one formed on the second processing surface 2, and can also be implemented as one formed on both the first and second processing surfaces 1, 2. By forming such a recess 13, a micropump effect can be obtained, and there is an effect that the fluid to be processed can be sucked between the first and second processing surfaces 1 and 2.

It is desirable that the base end of the recess 13 reaches the inner periphery of the first processing unit 10. The tip of the recess 13 extends toward the outer peripheral surface of the first processing surface 1, and the depth (cross-sectional area) gradually decreases from the base end toward the tip.
A flat surface 16 without the recess 13 is provided between the tip of the recess 13 and the outer peripheral surface of the first processing surface 1.

When the opening d20 of the second introduction part d2 is provided in the second processing surface 2, it is preferably provided at a position facing the flat surface 16 of the facing first processing surface 1.

The opening d20 is desirably provided on the downstream side (outside in this example) from the concave portion 13 of the first processing surface 1. In particular, it is installed at a position facing the flat surface 16 on the outer diameter side from the point where the flow direction when introduced by the micropump effect is converted into a laminar flow direction in a spiral shape formed between the processing surfaces. It is desirable to do. Specifically, in FIG. 2B, the distance n in the radial direction from the outermost position of the recess 13 provided in the first processing surface 1 is preferably about 0.5 mm or more. In particular, when depositing fine particles from a fluid, it is desirable to mix a plurality of fluids to be treated and deposit fine particles under laminar flow conditions. The shape of the opening d20 may be circular as shown by a solid line in FIG. 2B or FIG. 3B, and the center of the processing surface 2 as shown by a dotted line in FIG. It may be a concentric ring shape surrounding the opening. When the annular opening d20 is provided concentrically in the central opening of the processing surface 2, the second fluid can be introduced under the same conditions in the circumferential direction when introduced between the processing surfaces 1 and 2. it can. The annular opening d20 may not be provided concentrically with the central opening of the processing surface 2. Further, the annular opening d20 may be continuous or discontinuous.

The second introduction part d2 can have directionality. For example, as shown in FIG. 3A, the introduction direction from the opening d20 of the second processing surface 2 is inclined with respect to the second processing surface 2 at a predetermined elevation angle (θ1). . The elevation angle (θ1) is set to be more than 0 degrees and less than 90 degrees, and in the case of a reaction with a higher reaction rate, it is preferably set at 1 to 45 degrees.

Further, as shown in FIG. 3B, the introduction direction from the opening d <b> 20 of the second processing surface 2 has directionality in the plane along the second processing surface 2. . The introduction direction of the second fluid is a component in the radial direction of the processing surface that is an outward direction away from the center and a component with respect to the rotation direction of the fluid between the rotating processing surfaces. Is forward. In other words, a line segment in the radial direction passing through the opening d20 and extending outward is defined as a reference line g and has a predetermined angle (θ2) from the reference line g to the rotation direction R. This angle (θ2) is also preferably set to more than 0 degree and less than 90 degrees.

This angle (θ2) can be changed and implemented in accordance with various conditions such as the type of fluid, reaction speed, viscosity, and rotational speed of the processing surface. In addition, the second introduction part d2 may not have any directionality.

In the example of FIG. 1, the number of fluids to be treated and the number of flow paths are two, but may be one, or may be three or more. In the example of FIG. 1, the second fluid is introduced between the processing surfaces 1 and 2 from the second introduction part d2, but this introduction part may be provided in the first processing part 10 or provided in both. Good. Moreover, you may prepare several introduction parts with respect to one type of to-be-processed fluid. In addition, the shape, size, and number of the opening for introduction provided in each processing portion are not particularly limited, and can be appropriately changed. Further, an introduction opening may be provided immediately before or between the first and second processing surfaces 1 and 2 and further upstream.

In addition, since it is sufficient that the above reaction can be performed between the processing surfaces 1 and 2, the second fluid is introduced from the first introduction part d1 and the first fluid is introduced from the second introduction part d2, contrary to the above. May be introduced. In other words, the expressions “first” and “second” in each fluid have only an implication for identification that they are the nth of a plurality of fluids, and a third or higher fluid may exist.

As described above, in addition to the first introduction part d1 and the second introduction part d2, the third introduction part d3 can be provided in the processing apparatus. In this case, for example, the first fluid, It is possible to introduce the second fluid and the third fluid separately into the processing apparatus. In this way, the concentration and pressure of each fluid can be individually managed, and in particular, when producing fine particles, the processing for obtaining fine particles and the stabilization of the particle size of the obtained fine particles are more precisely controlled. can do. Note that the combination of fluids to be processed (first fluid to third fluid) to be introduced into each introduction portion can be arbitrarily set. The same applies to the case where the fourth or more introduction portions are provided, and the fluid to be introduced into the processing apparatus can be subdivided in this way.
Further, the temperature of the fluid to be treated such as the first and second fluids is controlled, or the temperature difference between the first fluid and the second fluid (ie, the temperature difference between the fluids to be treated to be supplied) is determined. It can also be controlled. In order to control the temperature and temperature difference of each processed fluid to be supplied, the temperature of each processed fluid (processing device, more specifically, the temperature immediately before being introduced between the processing surfaces 1 and 2) is measured. It is also possible to add a mechanism for heating or cooling each fluid to be processed introduced between the processing surfaces 1 and 2.

Regardless of the number of the flow paths, in the present invention, a fluid flow between the processing surfaces 1 and 2 is introduced by introducing a raw material fluid containing at least one kind of raw material described later from the first introduction part d1. It is possible to prevent the processed material from adhering to the processing surfaces 1 and 2 forming the path. Although the cause is specifically elucidated at present, the fluid to be processed flowing between the processing surfaces 1 and 2 is processed fluid near the processing surface 1 of the rotating processing portion 10. The fluid to be treated in the vicinity of the treatment surface 2 of the treatment portion 20 that does not rotate, although it flows at the same speed as or very close to the rotation speed of the portion 10, has no speed or rotates. It is conceivable that the flow is slower than the flow in the vicinity of the processing surface 1 or hardly flows. Therefore, in the case of processing at least two types of fluids to be processed by laying on the processing surface 2 of the processing unit 20 that does not rotate the opening d20 in the above technical content, the raw material fluid When at least one other type of fluid other than the above, that is, a fluid for treating the raw material is introduced from the first introduction part d1, and the raw material fluid is introduced from the second introduction part d2, the treated raw material However, it is thought that it was the cause of adhesion so far that it is easy to process in the place where it is comparatively difficult to flow between the processing surfaces 1 and 2. By introducing the raw material fluid from the first introduction part d1, the processed raw material can be obtained in a fast flow between the processing surfaces 1 and 2 or in a place where it is relatively easy to flow. It is thought that it was possible to prevent the treated product from adhering to 2. Therefore, since the raw material fluid is introduced from the first introduction part d1, adhesion to the processing surfaces 1 and 2 can be prevented. Therefore, particularly for the purpose of producing fine particles, it is more continuous and stable than before. In particular, it was possible to produce fine particles.

In the present embodiment, the first and second processing surfaces 1 and 2 both have an annular shape having an opening in the center, but one of the processing surfaces 1 and 2 has an opening in the center. It can also be carried out without providing an opening in the center on the other side. The total opening area (a) of the gap between the first and second processing surfaces 1 and 2 in the central first introduction part d1 is not more than 5 times the total opening area (b) of the opening d20. Is desirable. Here, the total opening area (a) is the total between the processing surfaces at a point f (hereinafter referred to as the nearest point f) closest to the center of the ring where the first fluid and the second fluid merge. It means an opening area (see FIG. 3A). Specifically, the distance between the first and second processing surfaces 1 and 2 is a circle having a radius β from the center of the first and second processing surfaces 1 and 2 to the nearest point f. The product of α is the total opening area (a).
The closest point f means the innermost side (a point close to the center in the radial direction) in the opening d20, and in the case where two or more openings d20 are provided, it is the innermost position.
As shown in FIG. 4, when two or more openings d20a and d20b are provided, the total opening area (a) at the closest point f is not more than five times the opening area of each opening d20a and d20b. It is desirable.
The total opening area (a) at the nearest point f is preferably 5 times or less of the total opening area (b) of the opening d20, more preferably 3 times or less, and even more preferably 2 times or less. Furthermore, although it does not specifically limit as a minimum, It is desirable that it is 0.001 times or more, and more realistically 0.01 times or more.
Further, the flow rate of the raw material fluid per unit time from the central first introduction part d1 is 0.1 to 20000 times the flow rate of at least one other kind of fluid per unit time from the second introduction part d2. It is desirable that If it is less than 0.1 times, the flow rate of introduction from the center cannot be increased so much and the effect becomes small. Even if it exceeds 20000 times, there is no particular problem, but there is a possibility that the total flow rate of the second introduction part d2 becomes extremely small or the overall balance is lost.
Furthermore, it is desirable that the flow rate of the raw material fluid per unit time introduced between the processing surfaces 1 and 2 from the first introduction part d1 is 20 ml or more per minute. If it falls below 20 ml per minute, the flow rate of introduction from the center cannot be increased so much and the effect becomes small.

In the above apparatus, as shown in FIG. 1, processes such as precipitation / precipitation / emulsification or crystallization are arranged so as to be able to approach and separate from each other, and at least one of them rotates with respect to the other. Occurs with forced uniform mixing between

surfaces

1 and 2. In particular, when the purpose is to produce fine particles, the particle size and monodispersity of the fine particles obtained are the rotational speed and flow rate of the

processing parts

10 and 20, the distance between the processing surfaces, the raw material concentration, or the solvent. It can be controlled by appropriately adjusting the seeds.

In the present invention, at least one kind of source material contained in the source fluid is not particularly limited. Although all objects of interest can be mentioned, particularly when the purpose is to produce fine particles, a raw material which can be fine particles can be a raw material. Examples of raw materials include inorganic materials, organic materials, and organic / inorganic composite materials. For example, metals and nonmetals, or metal and nonmetal organic and / or inorganic compounds, pigments and biological ingestions (pharmaceuticals) Compounds used in the living body and substances intended to be ingested by the living body), resin and oil components, etc., and all substances intended to be treated between the processing surfaces 1 and 2 can be mentioned. . The raw material can be used as it is by introducing the raw material fluid as a raw material fluid between the processing surfaces 1 and 2 from the first introduction part d1, or a raw material mixed / dissolved in various solvents such as water and organic solvents. Even if it introduces between the processing surfaces 1 and 2 as a fluid, it can implement.
In the present invention, the fluid for treating the raw material, which is at least one other type of fluid other than the raw material fluid, is not particularly limited. The treatment is not particularly limited, and examples thereof include precipitation, emulsification, dispersion, reaction, and aggregation. For example, in the present invention, when a raw material processed by precipitation is obtained, a raw material fluid and a fluid for precipitating the raw material contained in the raw material fluid are disposed close to each other. It is possible to obtain a deposited source material by mixing in a thin film fluid where possible between at least two processing surfaces, at least one rotating relative to the other. Further, in the present invention, when obtaining a raw material processed by a reduction reaction, a raw material fluid and a fluid for reducing the raw material contained in the raw material fluid are disposed opposite to each other. Mixing in a thin film fluid that can be separated between at least two processing surfaces, at least one rotating relative to the other, can be carried out to obtain a reduced source material. Thus, the raw material and the treated raw material may be the same material or different materials before and after the treatment.

In the present invention, to the extent that does not affect the present invention, a fluid containing a raw material fluid, a fluid containing at least one other fluid other than the raw material fluid, or both, a block copolymer or a polymer, A dispersant such as a surfactant may be included. The dispersant may be contained in a third fluid different from a fluid containing the raw material fluid and a fluid containing at least one other type of fluid other than the raw material fluid.

Next, the method for preventing adhesion of treated material according to the present invention can be used for the production of the following fine particles. The present invention is not limited to the following examples, and can be used for the production of fine particles that have been made by conventional batch methods, continuous methods, or microreactors or micromixers.

A reaction (acid pasting method) in which at least one pigment is dissolved in a strong acid such as sulfuric acid, nitric acid, hydrochloric acid, and the like, and an acidic pigment solution is mixed with a solution containing water to obtain pigment particles.
Alternatively, a pigment solution prepared by dissolving at least one pigment in an organic solvent is a poor solvent for the pigment, and is a poor solvent compatible with the organic solvent used for the preparation of the solution A reaction (reprecipitation method) in which the pigment particles are precipitated by being put into the inside.
Alternatively, the pigment solution in which at least one kind of pigment is dissolved in either an acidic or alkaline pH adjusting solution or a mixed solution of the pH adjusting solution and an organic solvent, and the pigment contained in the pigment solution have solubility. Reaction to obtain pigment particles by mixing with a pigment deposition solution that changes the pH of the pigment solution that is not shown or has a lower solubility in the pigment than the solvent contained in the pigment solution.

Reaction in which metal fine particles are supported on the surface of carbon or carbon black by liquid phase reduction method (as the metal, platinum, palladium, gold, silver, rhodium, iridium, ruthenium, osmium, cobalt, manganese, nickel, iron, chromium, Examples thereof include at least one metal selected from the group consisting of molybdenum and titanium).

Reaction of producing a crystal composed of fullerene molecules and fullerene nanowhiskers / nanofiber nanotubes by mixing a solution containing a first solvent dissolving fullerene and a second solvent having a solubility of fullerene smaller than that of the first solvent. .

Reaction for reducing a metal compound or metal ion (the metal may be a noble metal such as gold, silver, ruthenium, rhodium, palladium, osmium, iridium, platinum, copper, or an alloy of the two or more metals) ).

Reaction to hydrolyze ceramic raw materials (The ceramic raw materials include Al, Ba, Mg, Ca, La, Fe, Si, Ti, Zr, Pb, Sn, Zn, Cd, As, Ga, Sr, Bi, Ta, Examples include at least one selected from Se, Te, Hf, Ni, Mn, Co, S, Ge, Li, B, and Ce).

Reaction of precipitating titanium dioxide ultrafine particles by hydrolysis of titanium compound (as the titanium compound, tetramethoxy titanium, tetraethoxy titanium, tetra-n-propoxy titanium, tetraisopropoxy titanium, tetra-n-butoxy titanium, tetraiso Examples include at least one selected from tetraalkoxytitanium such as butoxytitanium and tetra-t-butoxytitanium or derivatives thereof, titanium tetrachloride, titanyl sulfate, titanium citrate, and titanium tetranitrate).

Reaction of semiconductor raw material containing fluids containing ions of different elements and compound semiconductor fine particles by coprecipitation / precipitation (compound semiconductors include II-VI group compound semiconductors, III-V group compound semiconductors, Examples include group IV compound semiconductors and group I-III-VI compound semiconductors).

Reaction for reducing semiconductor element to produce semiconductor fine particles (Example of semiconductor element is an element selected from the group consisting of silicon (Si), germanium (Ge), carbon (C), and tin (Sn)) .

Reaction to reduce magnetic raw material to produce magnetic fine particles (magnetic raw materials include nickel, cobalt, iridium, iron, platinum, gold, silver, manganese, chromium, palladium, yttrium, lanthanides (neodymium, samarium, gadolinium , And terbium).

Mixing a fluid in which at least one biologically ingestible particulate raw material is dissolved in a first solvent with a solvent that can be a second solvent having a lower solubility of the biologically ingestible particulate raw material than the first solvent, Reaction to precipitate.
Alternatively, a reaction in which a fluid containing at least one kind of an acidic substance or a cationic substance and a fluid containing at least one kind of a basic substance or an anionic substance are mixed and the biologically ingested fine particles are precipitated by a neutralization reaction. For example, in the present invention, when depositing barium sulfate fine particles taken into a living body as a contrast agent, a water-soluble barium salt solution is used as a raw material fluid, and a water-soluble sulfuric acid compound solution containing sulfuric acid is at least one other than the raw material fluid. Both are mixed as a kind of fluid, and barium sulfate fine particles are precipitated by a neutralization reaction.

Mixing a fluid to be treated containing an oil phase component containing a fat-soluble pharmacologically active substance and a fluid to be treated comprising at least an aqueous dispersion solvent, or an aqueous phase component containing a water-soluble pharmacologically active substance The process of obtaining microemulsion particle | grains by mixing the to-be-processed fluid containing this and the to-be-processed fluid which consists of an oil-type dispersion solvent at least.
Alternatively, at least one of the dispersed phase and the continuous phase contains one or more phospholipids, the dispersed phase contains a pharmacologically active substance, the continuous phase comprises at least an aqueous dispersion solvent, and is continuous with the fluid to be treated of the dispersed phase. Treatment to obtain liposomes by mixing with the fluid to be treated in phase.

A process in which a fluid obtained by dissolving a resin in a solvent that is soluble and compatible with the resin is mixed with an aqueous solvent to obtain resin fine particles by precipitation or emulsification, an oil phase component such as a resin or oil, and an aqueous phase component. Processing to obtain an emulsion by mixing.
Or the process which obtains resin fine particles by mixing the resin melted by heating and solvent (it is not limited about aqueous property and oiliness), and emulsifying and dispersing. Alternatively, the resin fine particle dispersion is mixed with a compound solution in which a compound such as a salt is dissolved to aggregate the resin fine particles.

Friedel-Crafts reaction, nitration reaction, addition reaction, elimination reaction, transfer reaction, polymerization reaction, condensation reaction, coupling reaction, acylation, carbonylation, aldehyde synthesis, peptide synthesis, aldol reaction, indole reaction, electrophilic substitution Reaction, nucleophilic substitution reaction, Wittig reaction, Michael addition reaction, enamine synthesis, ester synthesis, enzyme reaction, diazo coupling reaction, oxidation reaction, reduction reaction, multistage reaction, selective addition reaction, Suzuki-Miyaura coupling reaction, Kumada-Corriu reaction, metathesis reaction, isomerization reaction, radical polymerization reaction, anion polymerization reaction, cation polymerization reaction, metal catalyzed polymerization reaction, sequential reaction, polymer synthesis, acetylene coupling reaction, episulfide synthesis, episulfide synthesis, Bamberger rearrangement, Chapman rearrangement, Claisen condensation, quinoline synthesis, Paal-Knorr furan synthesis, Paal-Knorr pin Synthesis, Passerini reaction, Paterno-Buchi reaction, carbonyl-ene reaction (Prins reaction), Jacobsen rearrangement, Koenigs-Knorr glycosidation reaction, Leuckart-Wallach reaction, Horner-Wadsworth-Emmons reaction, Gassman reaction, Noyori asymmetric hydrogen Reaction, Perkin reaction, Petasis reaction, Tishchenko reaction, Tishchenko reaction, Ullmann coupling, Nazarov cyclization, Tiffeneau-Demjanov rearrangement, template synthesis, oxidation using selenium dioxide, Reimer-Tiemann reaction, Grob cleavage reaction, haloform reaction, Malaprade Glycol oxidative cleavage, Hofmann elimination, Lawesson reagent thiocarbonylation reaction, Lossen rearrangement, cyclic ketone synthesis using FAMSO, Favorskii rearrangement, Feist-Benary furan synthesis, Gabriel amine synthesis, Glaser reaction, Grignard reaction, Cope elimination, Cope rearrangement, diimide reduction of alkynes, Eschenmoser aminomethylation reaction, [2 + 2] photocyclization reaction, Appel reaction, aza-Wittig reaction, Bartoli indole synthesis, Carroll Position, Chichibabin reaction, Clemmensen reduction, Combes quinoline synthesis, 辻 -Trost reaction, TEMPO oxidation, dihydroxylation using osmium tetroxide, Fries rearrangement, Neber rearrangement, Barton-McCombie deoxygenation, Barton decarboxylation, Seyferth-Gilbert Alkyne synthesis, Pinnick (Kraus) oxidation, Ito-Tanae oxidation, Eschenmoser cleavage reaction, Eschenmoser-Claisen rearrangement, Doering-LaFlamme allene synthesis, Corey-Chaykovsky reaction, acyloin condensation, Wolff-Kishner reduction, IBX oxidation, Parikh-Doering oxidation , Reissert reaction, Jacobsen kinetic optical resolution hydrolysis, benzylic acid rearrangement, Ulsan cross coupling, Luche reduction, oxymercuration, Vilismeier-Haak reaction, Wolff rearrangement, KolbeSchmitt reaction, Corey-Kim oxidation, Cannizzaro reaction, Henry reaction , Alcohol conversion to alkane, Arndt-Eistert synthesis, hydroformylation reaction, Peterson olefination, decarbonylation reaction, Curtius rearrangement, Wohl-Zieglar ant Coordinate bromination, Pfitzner-Moffatt oxidation, McMurry coupling, Barton reaction, Balz-Schiemann reaction, Masamune-Bergman reaction, Dieckmann condensation, pinacol coupling, Williamson ether synthesis, iodolactonization reaction, Harries ozonolysis, activated manganese dioxide Oxidation, cyclotrimerization reaction of alkyne, Kumada-Tamao-Corriu cross-coupling, sulfoxide and selenoxide syn-β elimination, Fischer indole synthesis, Oppenauer oxidation, Darzens condensation reaction, Alder ene reaction, Sarett-Collins oxidation, Nozaki-Kashiyama-Kishi coupling reaction, Weinreb ketone synthesis, DAST fluorination, Corey-Winter olefin synthesis, Hosomi-Sakurai reaction, alcohol oxidation using PCC (PDC), Jones oxidation (Jones Oxidation), Keck allylation reaction, Cyanide addition using Nagata reagent, Negishi coupling, Ireland-Claisen rearrangement, Baeyer-Villiger oxidation, p-methoxybenzyl (PMB or MPM), dimethoxybenzyl (DMB) protection, deprotection, Wacker oxidation, Myers asymmetric alkylation, Yamaguchi macrolactonization, Mukaiyama-Corey macrolactonization, Bode peptide synthesis, Lindlar reduction, homogeneous hydrogenation, orthometalation, Various reactants starting from organic compounds such as Wagnar-Meerwein rearrangement, Wurtz reaction, ketone synthesis using 1,3-dithiane, Michael addition, ketone synthesis with Stork enamine, Pauson-Khand cyclopentene synthesis, and Tebbe reaction Reaction to obtain organic compounds or their fine particles by organic reaction.

Hereinafter, the present invention will be described in more detail with reference to examples. However, the present invention is not limited to these examples.

In the following embodiments, “from the center” means “from the first introduction part d1” of the fluid treatment apparatus shown in FIG. 1, and the first fluid is the first fluid to be treated described above. And the second fluid refers to the second fluid to be treated introduced from the second introduction part d2 of the treatment apparatus shown in FIG. Further, the shape of the opening d20 of the fluid processing apparatus of FIG. 1 is a concentric ring shape surrounding the central opening of the processing surface 2 as indicated by a dotted line in FIG.

(Examples 1 to 3, Comparative Examples 1 to 3) Production of Quinacridone Nanoparticles As shown in FIG. 1, at least one of them has an approachable / separable processing surface disposed opposite to the other. Using a reactor that uniformly diffuses, stirs, and mixes in a thin film fluid formed between

rotating processing surfaces

1 and 2, quinacridone pigment (CIPigment Violet 19, hereinafter referred to as PV-19) is concentrated sulfuric acid. The quinacridone solution dissolved in the solution and methanol are mixed and the precipitation reaction is performed in the thin film fluid.

A 2.0 wt% PV-19 solution, in which PV-19 powder is dissolved in concentrated sulfuric acid, is fed as the first fluid from the center at a supply pressure / back pressure = 0.350 MPa / 0.02 MPa. Two fluids were introduced between the processing surfaces 1 and 2. (Rotation speed: 1500rpm)
The first fluid and the second fluid were mixed in the thin film fluid, and the PV-19 nanoparticle dispersion was discharged from between the processing surfaces 1 and 2. Loosely aggregate the PV-19 nanoparticles in the discharged dispersion of PV-19 nanoparticles, filter it using a 1.0 μm aperture filter cloth, wash with pure water, and then wet the PV-19 nanoparticles wet cake. Obtained. Part of a wet cake of PV-19 nanoparticles was diluted with an aqueous solution of Neogen RK (Daiichi Kogyo Seiyaku Co., Ltd.) as a surfactant, and Claremix (trade name CLM-2.2S, M) -Re-dispersed by Technic Co., Ltd. to prepare a PV-19 nanoparticle dispersion.

The obtained PV-19 nanoparticle dispersion was diluted, placed on a collodion membrane, and subjected to TEM observation to confirm the primary particle size. For TEM observation, JEM-2100 manufactured by JEOL Ltd. was used, and the primary particle diameter was observed and measured at a magnification of 20,000 times for a plurality of visual fields, and an average value was used.

Table 1 shows the state of adhesion of the first and second fluids and PV-19 nanoparticles to the processing surfaces 1 and 2 and the transition of the primary particle diameter (represented as particle diameter in Table 1) by continuous operation. The state of adhesion of the PV-19 nanoparticles to the processing surfaces 1 and 2 was visually confirmed every processing time. Specifically, when there was adhesion of PV-19 nanoparticles that could be confirmed with the naked eye on the processing surfaces 1 and 2, it was determined that “deposition of precipitates on the processing surface” was present.

In the apparatus used in these examples and comparative examples, the opening d20 of the separate introduction path d2 has a single concentric annular shape surrounding the central opening of the processing surface 2 as described above. In Example 1, the ratio (a / b) between the total opening area (a) of the gap between the processing surfaces and the total opening area (b) of the opening leading to the separate introduction path is 0. 2, 3.0 in Example 2, 4.8 in Example 3, 5.4 in Comparative Example 1, 20.0 in Comparative Example 2, and 60.0 in Comparative Example 3.
From Table 1, it is possible to easily prevent adhesion to the processing surfaces 1 and 2 by using a quinacridone solution containing the raw material PV-19 as the first fluid. It was also found that uniform fine particles can be produced continuously and stably.

(Examples 4-6, Comparative Examples 4-6) Production of Tin Nanoparticles As shown in FIG. 1, at least one of the surfaces has a treatment surface that can be approached / separated and is opposed to the other. Using a reactor that uniformly diffuses, stirs, and mixes in a thin film fluid between the

rotating processing surfaces

1 and 2, a tin chloride solution in which tin chloride is dissolved in methanol and sodium borohydride as a reducing agent A reducing agent solution obtained by dissolving thiocalcol 08 (manufactured by Kao Corporation) as a surfactant in a mixed solvent of methanol and toluene is mixed, and a reduction reaction is performed in a thin film fluid.

A 5.3 wt% tin chloride solution in which tin chloride is dissolved in methanol is fed from the center as supply fluid / back pressure = 0.300 MPa / 0.02 MPa, and the reducing agent solution is used as the second fluid. It was introduced between the processing surfaces 1 and 2. (Rotation speed: 1700 rpm)
The first fluid and the second fluid were mixed in the thin film fluid, and the tin nanoparticle dispersion was discharged from between the processing surfaces 1 and 2. Tin nanoparticles in the discharged tin nanoparticle dispersion were agglomerated loosely, collected using a 1.0 μm mesh filter cloth, and washed with methanol to obtain a wet cake of tin nanoparticles. A part of the wet cake of tin nanoparticles was diluted with methanol and dispersed with an ultrasonic cleaner to obtain a tin nanoparticle dispersion.

The obtained tin nanoparticle dispersion was placed on a collodion film and subjected to TEM observation to confirm the primary particle diameter. For TEM observation, JEM-2100 manufactured by JEOL Ltd. was used, and the primary particle diameter was observed and measured at a magnification of 20,000 times for a plurality of visual fields, and an average value was used.

Table 2 shows the state of adhesion of the first and second fluids and the treatment surfaces 1 and 2 of the tin nanoparticles and the transition of the primary particle diameter (represented as particle diameter in Table 2) by continuous operation. In addition, the adhesion state to the processing surfaces 1 and 2 of the tin nanoparticles was visually confirmed every processing time. Specifically, when there was adhesion of tin nanoparticles that can be confirmed with the naked eye on the processing surfaces 1 and 2, “adhesion of precipitates on the processing surface” was considered to be present.

In the apparatus used in these examples and comparative examples, the opening d20 of the separate introduction path d2 has a single concentric annular shape surrounding the central opening of the processing surface 2 as described above. In Example 4, the ratio (a / b) between the total opening area (a) of the gap between the processing surfaces and the total opening area (b) of the opening leading to the separate introduction path is 0. 3, 2.0 in Example 5, 4.8 in Example 6, 5.6 in Comparative Example 4, 20.0 in Comparative Example 5, and 50.0 in Comparative Example 6.
From Table 2, it is possible to easily prevent adhesion to the processing surfaces 1 and 2 by using a tin chloride solution containing tin chloride, which is a raw material, as the first fluid, and it can be operated for a long time. It was also found that uniform fine particles can be produced continuously and stably.

DESCRIPTION OF SYMBOLS 1 1st processing surface 2 2nd processing surface 10 1st processing part 11 1st holder 20 2nd processing part 21 2nd holder d1 1st introduction part d2 2nd introduction part d20 Opening part p Fluid pressure provision mechanism

Claims

At least two kinds of fluids are used as the fluid to be treated.
Among them, at least one type of fluid is a source fluid containing at least one source material,
At least one other type of fluid other than the above is a fluid for treating the raw material,
A thin film fluid formed between at least two processing surfaces that are arranged opposite to each other and are capable of approaching / separating, at least one rotating relative to the other. In a fluid processing method to obtain a processed raw material mixed in
By introducing the raw material fluid from the center of at least two processing surfaces disposed opposite to each other and capable of approaching / separating at least one rotating relative to the other,
A method for preventing adhesion of a processed material, characterized in that a raw material material treated between the treatment surfaces is prevented from adhering to the treatment surfaces.
The method for preventing adhesion of a treated product according to claim 1, wherein the treatment is at least one selected from precipitation, emulsification, dispersion, reaction, and aggregation.
The raw material fluid passes between the processing surfaces while forming the thin film fluid,
It has a separate introduction path that is independent from the flow path through which the raw material fluid flows.
At least one of the at least two processing surfaces includes at least one opening that leads to the separate introduction path,
Introducing at least one other kind of fluid between the opening and the processing surface;
The method for preventing adhesion of a processed material according to claim 1 or 2, wherein the raw material fluid and at least one other kind of fluid are mixed in the thin film fluid.
The processed material according to any one of claims 1 to 3, wherein the raw material processed between the processing surfaces is a fine particle having a primary particle diameter equal to or less than the interval between the processing surfaces. Adhesion prevention method.
At least one of the processing surfaces has an annular shape, and the raw material fluid is introduced between the processing surfaces from the center of the annular shape,
The total opening area (a) of the gap between the processing surfaces at the point closest to the center of the ring where the raw material fluid and the at least one other kind of fluid join together is the additional introduction path. The method for preventing adhesion of a treated product according to claim 3, wherein it is not more than 5 times the total opening area (b) of the opening to be communicated.
At least one of the processing surfaces has an annular shape, and the raw material fluid is introduced between the processing surfaces from the center of the annular shape,
Including at least two openings of the separate introduction path leading to the processing surface;
The total opening area (a) of the gap between the processing surfaces at the point closest to the center of the ring where the raw material fluid and the at least one other kind of fluid join together is the additional introduction path. The method for preventing adhesion of a processed product according to claim 3, wherein the opening area is not more than 5 times the opening area of each opening.
The method for preventing adhesion of a treated product according to any one of claims 3 to 6, wherein the shape of the opening portion of the separate introduction path leading to the processing surface is an annular shape.
At least one of the processing surfaces has an annular shape, and the raw material fluid is introduced between the processing surfaces from the center of the annular shape,
The flow rate of the raw material fluid per unit time introduced between the processing surfaces from the annular center is 0.1 to 20000 of the flow rate of the at least one other type of fluid per unit time from the opening. The method for preventing adhesion of a treated product according to any one of claims 3 to 7, characterized in that it is doubled.